It has a very complex engine. I experienced this while trying to rectify overheating problem on one of my boss's car
Even THermostat cannot be cahnged without taking out the intake manifold
Taking the Timing cover off means taking off, power steering pump, main pulley, AC compressor and one foundation, AFter that there are around 20 bolts to work with.
If head gets deshaped there is not much room for facing as the timing cover is single peice and is a tight fit.
Nightmare for any mechanic as even a gsket change required engine to be taken out and if you try to do it without taking it out, its a 5 hour job to dismantle only.
Also heating problem is common as i found it in 6 7 oflianas around me all because of a stuck thermostat in close position.
These are some facts i wanted to share.